So the form previously said:
"Similarly, speculation about the existence of wrongdoing does not provide sufficient basis to meet the statutory requirements of the ICWPA. If you think wrongdoing took place, but can provide nothing more than second-hand or unsubstantiated assertions, IC IG will not be able to process the complaint or information for submission as an ICWPA."
The link says:
"Although the form requests information about whether the Complainant possesses first-hand knowledge about the matter about which he or she is lodging the complaint, there is no such requirement set forth in the statute. In fact, by law the Complainant – or any individual in the Intelligence Community who wants to report information with respect to an urgent concern to the congressional intelligence committees – need not possess first-hand information in order to file a complaint or information with respect to an urgent concern."
I don't know jack shit about US law. Either it's required by statute or it isn't.